Talvez deva tentar algumas variações de ortografia:
held computers » held computer (Expandir a Pesquisa), handheld computers (Expandir a Pesquisa)
nac competing » a competing (Expandir a Pesquisa), ai competing (Expandir a Pesquisa), new competing (Expandir a Pesquisa)
nagy compared » day compared (Expandir a Pesquisa), daily compared (Expandir a Pesquisa), early compared (Expandir a Pesquisa)
computers a » computers _ (Expandir a Pesquisa)
causes non » cause non (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
j held » j head (Expandir a Pesquisa)
a nagy » e nagy (Expandir a Pesquisa)
a now » a new (Expandir a Pesquisa), a non (Expandir a Pesquisa), _ now (Expandir a Pesquisa)
3 nac » 3 nacl (Expandir a Pesquisa), _ nac (Expandir a Pesquisa), a nac (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Performing a fuzzy search may retrieve terms with similar spellings: (( j held computers a now ) or ((( 3 nac competing causes non ) or ( a nagy compared a now ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j held computers a now ) OR ((( 3 nac competing causes non ) OR ( a nagy compared a now )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j held computers a now ) or ((( 3 nac competing causes non ) or ( a nagy compared a now ))))*.